I took the train from CDG that was going to Paris, we got stuck in a tunnel for 4 hours and when we got evacueted a woman from RER said we could take a taxi and i would get my money back from RER. How do i get my money back? Who can I call og send an email?
Your best bet is to contact the Paris city train authority, RATP, through their contact form and lodging your request:
If you're still in Paris now you can call the local customer service number:
Service clientèle RATP
3424 (Service gratuit + prix d’un appel)
And finally by mail here:
RATP Service clientèle
75564 PARIS Cedex 12